511352000644 has 6 divisors (see below), whose sum is σ = 894866001134. Its totient is φ = 255676000320.

The previous prime is 511352000641. The next prime is 511352000657. The reversal of 511352000644 is 446000253115.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 510996225600 + 355775044 = 714840^2 + 18862^2 .

It is a super-2 number, since 2×511352000644² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (511352000641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63919000077 + ... + 63919000084.

Almost surely, 2^511352000644 is an apocalyptic number.

It is an amenable number.

511352000644 is a deficient number, since it is larger than the sum of its proper divisors (383514000490).

511352000644 is a wasteful number, since it uses less digits than its factorization.

511352000644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127838000165 (or 127838000163 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 511352000644 its reverse (446000253115), we get a palindrome (957352253759).

The spelling of 511352000644 in words is "five hundred eleven billion, three hundred fifty-two million, six hundred forty-four", and thus it is an aban number.